Atlantic Salmon have silver skin with black cross like spots primarily above the lateral line, as well as one or several large black spots on their gill cover.  They have no spots of the tail.  In comparison to wild salmon, Atlantic Salmon are most similar in appearance to Coho Salmon.  They are commercially available from 4 - 18 lbs.  A key difference between Atlantic Salmon and other Salmon is that they are iteroparous, meaning they do not die after spawning, but can return to the sea.
Atlantic Salmon

Atlantic Salmon have a milder flavor than wild salmon.  The flesh ranges from pink to orange depending upon the amount of pigment added to their feed.  The flesh has a medium-firm texture with large flakes and a medium fat content.